2-Propenoic acid, 2-methyl-, butyl ester, polymer with butyl 2-propenoate and methyl 2-methyl-2-propenoate 25322-99-0 39322-09-3 Butyl acrylate, methyl methacrylate, butyl methacrylate polymer Methyl methacrylate, copolymer with butyl methacrylate and butyl acrylate